1 - Crystal structure of a material is,
generally, examined by
A. naked
eye
B. optical
microscope
C. metallurgical
microscope
D. X-ray
techniques
Answer=D
2 - Iron-carbon alloys containing 1.7 to
4.3% carbon are known as
A. eutectic
cast irons
B. hypo-eutectic
cast irons
C. hyper-eutectic
cast irons
D. none
of these
Answer=B
3 - The heat treatment process used for
softening hardened steel is
A. carburising B. normalising
C. annealing D. tempering
Answer=D
4 - The hardness of steel increases if it
contains
A. pearlite
B. ferrite
C. cementite D. martensite
Answer=C
5 - The cupola is used to manufacture
A. pig iron
B. cast iron
C. wrought
iron
D. steel
Answer=B
6 - The property of a material due to which
it breaks with little permanent distortion, is called
A. brittleness B. ductility
C. malleability D. plasticity
Answer=A
7 - Blast furnace is used to produce
A. pig iron
B. cast iron
C. wrought
iron
D. steel
Answer=A
8- 18-4-1 high speed steel contains
A. vanadium
4%, chromium 18% and tungsten 1%
B. vanadium
1%, chromium 4% and tungsten 18%
C. vanadium
18%, chromium 1% and tungsten 4%
D. none of
the above
Answer=B
9 - The blade of a power saw is made of
A. boron
steel
B. high
speed steel
C. stainless
steel
D. malleable
cast iron
Answer=B
10 - The property of a material essential
for spring materials is
A. stiffness B. ductility
C. resilience D. plasticity
Answer=C
11 - Which of the following is an amorphous
material?
A. Mica B. Silver
C. Lead D. Glass
Answer=D
12 - Which of the following is an amorphous material?
A. Mica B. Silver
C. Lead D. Glass
Answer=D
13 - Monel metal is an alloy of
A. nickel
and copper
B. nickel
and chromium
C. nickel,
chromium and iron
D. copper
and chromium
Answer=A
14 - Pearlite consists of
A. 13%
carbon and 87% ferrite
B. 13%
cementite and 87% ferrite
C. 13%
ferrite and 87% cementite
D. 6.67%
carbon and 93.33% iron
Answer=B
15 - Bronze is an alloy of
A. copper
and zinc
B. copper
and tin
C. copper,
tin and zinc
D. none of
these
Answer=B
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